nazrin/omyacid/templates/meta-data.yml

instance_id: "iid-{{ inst_name }}"
local-hostname: "{{ inst_name }}"
{% if !ssh_pubkeys.is_empty() -%}
public-keys:
{% for key in ssh_pubkeys -%}
- "{{ key }}"
{% endfor %}
{%- endif -%}
{% if let Some(user) = username -%}
system_info:
  default_user:
    name: "{{ user }}"
{%- endif %}